Device for keeping a wing of a door open at a certain angle of aperture



April 24, 1962 T. EIHOLZER 3,030,653 DEVICE FOR KEEPING A WING OF A DOOR 0PEN AT A CERTAIN ANGLE 0F APERTURE iled May 5, 1960 5 Sheets-Sheet 1 r MW, @WK M M April 24, 1962 Filed May 5, 1960 T. EIHOLZER DEVICE FOR KEEPING A WING OF A DOOR OPEN AT A CERTAIN ANGLE OF APERTURE 3 Sheets-Sheet 2 drry Apnl 24, 1962 r. EIHOLZER 3,030,653

DEVICE FOR KEEPING A WING OF A DOOR OPEN AT A CERTAIN ANGLE OF APERTURE Filed May 5, 1960 3 Sheets-Sheet 3 1v QVX M Arr 3,030,653 DEVICE FOR KEEPING A WIN G OF A DOOR OPEN AT A CERTAIN AN GLE OF APERTURE Theodor Eiholzer, Schaifhausen, Switzerland, assignor to Aufzuge A.G., Schatfhausen, Switzerland Filed May 5, 1960, Ser. No. 27,144 Claims priority, application Switzerland Jan. 8, 1960 8 Claims. (Cl. 16-82) The invention relates to a device refe ed to hereinafter as a door arrester to be attached to a door, and has the primary object of keeping a wing of a door open at a certain angle of opening.

It is another object of the invention to provide a device of the kind referred to, wherein no operating members are required for securing the wing of the door in its open position or for releasing the same from its arrested position.

It is yet another object of the invention to provide a door equipped with a device according to the invention which is suitable for the doors of elevators.

With these and other objects in View which will become apparent later from this specification and the accompanying drawings, 1 provide a device for keeping open a wing of a door comprising in combination: a fixed door frame, a door wing hinged to the said fixed door frame. first arrester means stationarily mounted relative to the said door wing, and a fixing means having second arrester means mounted moveably relative to the said door wing and being moved relative thereto, when turning the said door wing relative to the said fixed door frame, the said first and second arrester means co-operating with one another in such a manner that when the said door wing is moved from its closed position in the sense of opening an angle exceeding 90 by a predetermined angle a a sub-sequent closing movement is resisted, and that when moving the said door wing a predetermined angle [3, exceeding said angle or, beyond 90 in the opening direction, the said door wing is released for its closing movement.

For example the said first arrester means include a base box, preferably of U-shaped profile, fixed in the said door wing, an arrester pin and a cam plate fixedly mounted on the said base box, and the said second arrester means consist in a member, preferably a lever, pivotally mounted in said fixed door frame about an axis offset from the hinge axis of the said door Wing to the said fixed door frame, a centrally symmetrical rotatable plate pivotally mounted on the said member, two dog pins mounted diagonally symmetrically on the said rotatable plate and co-operating with the said cam plate, the said member being guided on the said arrester pin in such a manner that upon moving the said door Wing relative to the said fixed door frame, part of the said member slides along the said arrester pin.

These and other features of my said invention will be clearly understood from the following description of two embodiments thereof given by way of example with reference to the accompanying drawings, in which:

FIG. 1 is a horizontal section of a. first embodiment of the invention taken along line II of FIG. 2;

FIG. 2 is a vertical section on the line II--II of FIG. 1, with the door wing frame omitted for clarity.

FIG. 3 is a horizontal section on the line IIIIII of FIG. of a second embodiment of the invention shown in the closed position of the door;

FIG. 4 is a broken off horizontal section on the line IVIV of FIG. 5 through the part of the door arrester located in the wing of the door, in the open position;

FIG. 5 is a vertical section taken along line V--V of FIG. 4; and

FIG. 6 is a vertical section taken along line VI-VI of FIG. 3.

The door arrester illustrated in FIGS. 1 and 2. has a base box 1 of U-shape profile which at one of its end faces is fixed by means of screws (not shown) to a frame 2 of a door wing, that is articulated by means of a hinge 3 to the stationary door frame 4. In the base box 1, between the opposite legs 5 and 6 thereof, an arrester pin 7 is mounted, by the side of which a short guide pin 8 is provided on the lower leg. In the upper leg 5 a longitudinal slot 9 is provided through which two screws 9', extend, by means of which a cam plate 10 is adjustably fixed to the leg 5 of the box. The cam plate 10 has at its side facing towards the pins 7 and 8 an edge profiled according to a curve 11. This curve 11, has firstly a section 11a inclined to the transverse direction of the base box, which leads into a re-entrant arrester recess 11b, and finally a short transversely directed section 11c. Part of the back 12 of the U-shaped base box is cut-01f at 13.

Between the two pins 7 and 8 a portion 14a of an arrester lever 14 is guided, which is articulated at 15 to a fork 16 attached to the door frame 4 in a manner not shown in more detail, for example by means of screws.

The lever '14 has a slight kink at 17 and has a rectangular profile on its portion 14:! guided between the pins 7 and 8. On this portion 14a of the lever a substantially rectangular plate 19 is rotatably mounted on a pin 18; On two diagonally opposite corners of the rotatable plate 19 two dog pins 20a and 20b are arranged, while the two other ends of the plate are cut off. The two short end faces of the plate 19 are denoted 21a and 21b, and the two lateral faces 22a and 22b. The whole arrangement 1921 is symmetrical about the pin 18. It is further assumed that an automatic door keeper of the usual type (not shown) is provided on the door.

The door arrester described operates in the following way:

When the wing of the door is opened, the pin 18 describes a circular are 23, the centre of which is formed by the articulation point 15 of the lever 14, while the cam plate 10 turns about the hinge 3, as indicated by the circular are 24. It will be seen that the lever 14 moves positively relative to the wing of the door, the portion 14a of the lever moving along the pins 7 and 8 so that the dog pin Ztla reaches the section 11a of the cam 11. The cam section 11a leads the dog pin 20a to the reentrant arrester recess 11b, whereby the rotatable plate 19 is turned relative to the portion 14a of the lever in the clockwise direction. This position of the cam plate and of the rotatable plate as indicated in chain-dotted lines results at an aperture angle of the wing of the door which exceeds by an angle oz, the illustratedelements of the door arrester being indicated as 10, 11a, 11b, etc; in this position. It is clear that the wing of the door cannot now be opened any further.

When the door wing is released, the same is moved by the automatic door keeper (not shown) in the sense of closing. The dog pin 21a then moves out of the reentrant arrester recess 11b. The dog pin 20b abuts the arrester pin 7, whereby the rotatable plate 19 is turned additionally a small angle in the clockwise sense relative to the lever portion 14a, until eventually its end face 21a abuts the arrester pin 7. Thereby any further closing movement of the door wing is prevented since the lever portion 14a cannot now move outward relative to the base box 1 any further. In this desired opening position the wing of the door is illustrated in chain-dotted lines, and the components shown are denoted 1", 2', etc. a

When it is now intended to close the door wing, one moves the same again in the sense of opening. Owing Patented Apr. 24, 1962,

inst described, in which the components illustrated are;

denoted 1'11", 114", etc., is attained at an aperture angle. Qft s oor w n .s 1 ht1y ex ee i Whsn the door wing is thenreleased' and moves under the action of the automatic door keeper in the sense of" closing, the

end'face 21a ofthe rotatable plate 19 does. not meet'any more the arrester pin 7' because of the continued rotation of this rotatable plate, so that the door wing is no longer retained at- 9Q' and returns to the original closed position.

During the closing movement, the longitudinal edge 22a of the rotatable plate 19 abuts the arrester pin 7, since the portion 14a of the lever advances between this pin 1 and the pin 8. Thereby [the rotatable plate 19 is turned further, until the lateral edges 22a and 22b are again in alignment with the portion 14g of the lever, and the rotatable plate 19 has accordingly-undergone a total rotation of- 180. The cycle can begin now anew, the part played by the elements 20a, 21a and 22a being however exchanged with thatof the elements 2%, 21b and 22b.

It is-to be-emphasized that the door arrester described does not comprise any spring, in that the rotation of the rotatable plate 1-9- always takes place positively; This is very. advantageous, since springs after a while are liable to =break. V

The whole door arrester is built into the frame 2'of the door wing; For the functioning of the door arrester it is obviously not necessary to havean automatic door keeper available; however in this case the movements of the wing of the doorin the sense of closing have then to be carried out by: hand. It is clear that the aperture angle at which the-doorwing isto be, arrested need not necessarily amount to 90, but in general: an aperture angle of 90il0- is preferred.

The embodiment described hereinabove of the door mester has:acertaindisadvantage. It may happen that the; door is. used fitvSODlfilllHlfi by a person who-in spite of the. plate, of instructions-does not understand its manner; of operation. It may then happen, that the user intends to Q1088, the open door wing, but instead of firstly moving it a bit further in theopening direction, pulls it forcibly inward. Since, the arrester means prevent the closing urcwernent,v it; may happen that an annoyed user applies such a force to the. door wing in the closing sense that; the door arrester is thereby seriously damaged.

disadvantage is overcome by the embodiment described hereinafter with reference to FIGS. 3 to 6.

The door arrester illustrated. in FIGS. 3 to 6 has .a box 1' of a i-shaped profile, which is attached at one end to a frame 2! of the door Wing articulated by means of a hinge, 3' to the stationary door frame 4'. In the base'box 1' transversely to the opposite legs 5' and 6 thereof an arrester pin 74 is provided, by the side of which a short guide pin 8. is arranged on the lower leg 6. The arrester pin, 74:, in contrast to the pin 7 of the first embodiment, is not fixedly mounted in the base box 1', bu is. sli ab ve i two ob iq e slo s- 31 and 32, parallel to o e ane h r o the less a respectively of the .9 e nds f h ar st P n 7.4 re. mounted in two angle pieces 33 and 3 4, the upper end; of this, pin in be g, f m s a uc d eade p r ion. sn is a W her- 36 n ia u 3 ar moun d ecu n th pin in. its. long u n dir ction.

'In the back of th b se box 1 two small transverse P ate 8 an .9 a e erted. wh c p u e beyond this back and serve at their ends as the abutments for two pai f s m r ssio pr gs a sp c i e y. of ish. in F G- 5 mer ly t e a e a e i cated y chain 4 dotted lines and denoted with these reference characters. These springs 49 and 41' are on the other hand supported on the ends of the vertical legs 42 and 43 of the angle pieces 33 and 34. It will be seen that the angle pieces 33 and 34 under the bias of the compression springs 40 and 41 tend to hold the arrester pin 7a in the position illustrated, i.e, on the bottom of the slots 31 and 32 In he. upper leg along udinal. 10t9 s. p ovide through which passes a screw 9, by means of which a cam plate 10a.is adjustably mounted on the leg 5' of the box The cam plate 10, has an edge profiled in accordance with a. curve 11'. This curve runs in a manner very similar to the corresponding curve in the first embodiment.

7 Between the two pins 1a :and 8 an arrester bar 44 of rectangular profile is guided, which is articulated at its inner end by means of a pin 45 to one end of a connectmg rod 46, the other end of; which is articulated by a pin 47 to the fork 16. This fork 16' is attached by means of a threaded bolt 48' provided on it and of a nut 49'to the stationary door ham 4', which is reinforced by a plate 50.

For the guidance of the connecting rod 46 and of the arrester bar 44 two transversely directed guide pins 51 and 52 are provided on the legs 5 and6 of the box adjacent the fork 16'. A further guide pin 53 is arranged in a like manner-adjacent the free; end of thebase box 1'.

On the arrester bar44, not far from its free end, the substantiallyrectangular plate 19' is mounted rotatably by means of the pivot 18'. On two diagonally opposite corners of the rotatable plate 19 two dog pins 29a and 20b are arranged, while the two other corners of the plate are cut off;

i For the attachment of the base box 1' to the frame of the door wing 2 a plate 54 is welded toan end face (the right hand sideone in FIGS. 3 and 6) of the base box 1, which plate has a passage opening 5 5 for the fork 16 and is screwed by means of screws 56 to two connectorplates 57 welded to the frame of the door wing.

FIGS. 3 and 4 are so arranged relative to one another, that the door wing 2 in FIG. 4 is turned 90 relative to its position. in FIG. 3, as indicated by the circular are 24, the centre of which lies in the hinge 3' (FIG. 3). When turning the door frame into the opening position, the connecting rod 46 turns about the pin 47;, which is rather remote from, the hinge 3', as indicated by the circular are 58. Thereby the arrester bar 44 is shifted in the longitudinal direction relative to the base box 1. The arrester bar- 44 and the connecting rod 46 accordingly take over the function of the kinked arrester lever 14 of the first, embodiment; however, the components '44 a to. 46 of the present embodiment are applicable to left hand side and right hand side door wings alike, owing to being symmetrical tothe middle plane.

The cam plate 104 and the rotatable plate 19 with its dog pins Ziid' and 2911" co-operate in a like manner with one another, as described in the first embodiment. After the door wing has been opened an angle +a, it is turned back an angle a by an automatic door keeper (not shown), whereafter the rotatable plate 19 turned by the preceding movements. of the door wing in the position shown in FIG. 4 abuts with its small end face 21a. the arrester pin 7a and thereby keeps the door wing open at an angle of 9 0 In order to close the door wing the same has to be moved slightly in the sense of opening, which in conjunction with the cam plate 10' results in a further slight rotation of the rotatable plate 19, so that when releasing the door wing the arrester pin 7a does no longer prevent the same from being closed by the automatic door keeper.

if one tries to turn the open door wing forcibly in the closing direction instead of turning it firstly a little in opening direction, the. pressure applied by the rotatable plate 19 to the resiliently mounted arresterpin 7a rises eventually so high, that it overcomes the force of the two pairs of springs 40 and 41. The arrester pin 7a then slides outward in the two oblique slots 31, 32 so far, that the end face 21a disengages itself from this pin 7a, and the door wing consequently closes in spite of this irregular treatment. The strength of the springs 40 and 41 is so chosen, that the mechanism of the door arrester does not suffer any damage. Without the safety means 31 to 43 described hereinabove it may however happen, that by the forcible closing torque the stationary door frame 4' is locally deformed or torn by the fork 16', or that parts of the door arrester are bent or otherwise made useless.

While I have herein described and illustrated in the accompanying drawings what may be considered typical and particularly useful embodiments of my said invention, I wish it to be understood that I do not limit myself to the particular details or dimensions described and illustrated; for obvious modifications will occur to a person skilled in the art.

What I claim as my invention and desire to secure by Letters Patent is:

1. A device for keeping a turnable wing of a door open at a certain angle with respect to a door frame, comprising first arrester means stationarily mounted relative to said door wing, second arrester means mounted on a fixing member and movable relative to said door wing and being moved relative to the door wing when the door wing is turned with respect to the door frame, the first and second arrester means cooperating with each other in such a manner that when the door wing is turned with respect to the door frame from its closed position to an open position beyond a predetermined opening angle a subsequent closing movement of the door wing is resisted, and when the door wing is further opened beyond said open position the door wing is released for closing movement thereof, said first arrester means including a base box fixed in the door wing, an arrester pin and a cam plate fixedly mounted on said base box, said second arrester means including another member pivotally mounted on said fixing member, a symmetrical rotatable plate pivotally mounted on said other member and having an end face, and two dog pins mounted on said rotatable plate and cooperating with said cam plate, said other member being guided in such a manner that upon turning the door wing part of said other member slides along the arrester pin.

2. A device as claimed in claim 1, wherein the base box has a U-shaped profile and said other member is a lever, the pivot axis of which is oifset from the turning axis of the door wing.

3. A device as claimed in claim 1, wherein the cam plate is adjustably mounted on the base box.

4. A device as claimed in claim 1, wherein the cam plate has a first section inclined transversely of the base box, a re-entrant arrester recess adjoining the first inclined section, and a final section transverse of the base box, one of the dog pins of the rotatable plate being guided by said first inclined section into the re-entrant recess when the door wing is further opened beyond said open position.

5. A device according to claim 4, wherein the rotatable plate is rectangular, the two dog pins being mounted at two diagonally opposite corners of the rotatable plate, the two other diagonally opposite corners of the rotatable plate being cut off.

6. A device for keeping a turnable wing of a door open at a certain angle with respect to a door frame, comprising a first arrester means stationarily mounted relative to said door wing, spring means retaining said first arrester means in one position during a closing movement of the door wing unless retention force of the spring is overcome by excessive turning torque applied to the door wing during the closing movement of the door wing, whereupon said spring means allows the first arrester means to move from said one position, a fixing means stationarily mounted with respect to said door frame, said fixing means having second arrester means movable relative to the door wing and being moved relative to the door wing when the door wing is turned relative to the door frame, the first and second arrester means cooperating with each other in such a manner that when the door wing is turned with respect to the door frame from its closed position to an open position beyond a predetermined opening angle a subsequent closing movement of the door wing is resisted, and when the door wing is further opened beyond said open position the door wing is released for closing movement thereof, said first arrester means including an arrester pin resiliently mounted on the said door wing.

7. A device as claimed in claim 6, further comprising a base box having a U-shaped profile with flat sides, said box being fixedly mounted in the door wing and provided with oblique slots in its sides, said arrester pin being slidably guided in the oblique slots and being biased by said spring means towards ends of the slots.

8. A device as claimed in claim 6, wherein the said second arrester means include an arrester bar and a connecting rod articulated to the arrester bar and to the door frame, respectively, the articulation point thereof on the door frame being oifset from the turning axis of the door wing with respect to the door frame.

References Cited in the file of this patent UNITED STATES PATENTS 1,431,040 Rawlings Oct. 3, 1922 1,710,570 Collins Apr. 23, 1929 2,664,590 Allen Jan. 5, 1954 2,914,792 Campbell Dec. 1, 1959 FOREIGN PATENTS 351,066 Great Britain June 22, 1931 

